Cooling system



Dec. 29, 1931. w POPE, JR 1,838,450

COOLING SYS TEM Original Filed Aug. 25, 1926 U I Q i I Wiiiih 4:" W N MW; n l

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wlsconsm, assmnoa ro wrsconam, a coaromrron or WISCONSIN WAUKESHA I OTOB OQOLIHG SYSTEM Qriflnal application fled Augut as, use, Serial 110. 131,377. Divided and an application and August 22, ms. Serial no. comm.

This invention relates tocooling stems for internal combustion engines, an more particularly to a cooling system us ng a or container for water in conjunction with a a condenser or radiator.

In systems of known type, such as are common y used, when the engine is started up with the radiator or tank full of cold wathe water up to a ter, a relatively long time is required to bring pro r operating temperature for the engine. When this temperature is finally reached it does not remain constant, but continues to rise until the boiling temperature is reached, at which time the steam generated in the cylinder water 'acket passes to the atmosphere and is lost, an steam pockets under high pressure are frequently formed in the acket. As a result, the engine is always either too hot or too cold and maximum operatin elficiency is impossible. Also, as a result 0 this arrangement, there is a great loss of water in the form of steam.

In my improved system herein described, the water is quickly raised to'the boiling point and a constant temperature is maintained during the operation of the engine. The load on the engine or the temperature of the water in the tank will not alter this condition. When the available cooling surface is not suflicient to condense all of the steam genembed, the surplus steam only is discharged from the top of the tank. Whether the steam is all being condensed or not has no influence on the performance of the engine. In addition to the advantage of constant operating temperature enabling maximum efliciency in operation of the engine, my system has the advantage of requiring neither a cooling fan nor a circulating pump. Further objects and advantages of my invention will appear from the detailed description.

The single figure of the drawing is a sectional view through the cylinder and the condenser and water tank, and the connections therefor, constituting a cooling system in accordance with my invention. Y

I have illustrated my invention as applied to a water 'acket 1 surrounding cylinder 2 of an interna combustion engine E of known type, the engine and the cyhnder being shown as of conventional construction. A steam outlet pipe 3 connects the top of jacket 1 with A pipe 10 connects the tank 9, at the bottom' thereof, to water jacket 1' adjacent the lower end thereof. Under normal conditions, that is, with the engine out of operation and the system cold, the water level in the system is indicated by the line a--a, the water being at thislevel in tank 9, the tubes 6 of the condenser or radiator, and the outlet pipe 3. When the engine is started up there through the cylinder jacket and, as a result, the water in the cylinder jacket is quickly raised to boiling point, resulting in the generation of steam. The steam generated flows through the outlet pipe 3 into the header 4, the water in the pipe 3 above the cylinder jacket and the water in the tubes 6 of the condenser or radiator being subjected to the pressure of this steam. As the amount of steam generated increases, the water level will drop to make room for this steam. The water will thus be forced out of the tubes 6 and header 7 through nipple 8 into tank 9, and out of the water jacket 1 through pipe 10 into tank 9. Eventually the water level in the radiator 5 will reach the line c-c, at which time the steam will escape through the nipple 8 into the tank 9 where it will flow upwardly along the walls of the tank and through the water therein, this steam, under normal operating conditions, being condensed before it reaches the surface of the water in tank 9.

When the water in the radiator 5 is depressed to the level of the line H, the water in the cylinder jacket 1 and pipe 3 is depressed to a level between line cc and line 6-6, this level between lines 0-0 and b-b being the minimum low level of water in the cylinder jacket. This level between the lines 0 c and 6-6 is determined by the difference in steam pressure at the water surface in the radiator is no circulation of water and in pipe 3 caused by the restriction to flow of steam in pipe 3.

The flow of steam from the water jacket 1 through the pipe 3 is necessarily returne or restricted to a certain extent. If there were no restriction to the flow of steam through the outlet pipe 3, the water level in the jacket would correspond to the line 0-0.

Due to the restriction or resistance offered to flow of the steam through the pipe 3, the steam pressure above the cylinder 'acket is greater than the steam pressure in t e radiator or condenser. This makes it necessary to locate the upper portion of the nipple 8, which corresponds to the line c-c, above the minimum low water level bb of the jacket 1 a distance corresponding to the difference in steam ressure head at the water surface in the cylinder jacket and the water surface in the condenser. This difference of steam pressure is balanced by the head of water in the the tank 9 and pipe 10 lying between the lines b-b and c-c, such distance being indicated by H.

By this system the water in the jacket 1 is quickly raised to boiling temperature and, thereafter, the temperature of the water in the jacket is maintained constant, the minimum low water level in the water jacket being automatically controlled by the relative heights of the outlet nipple 8 and the jacket 1, as previously described. It will be noted that there is no direct escape for the steam to the atmosphere after it has passed through the condenser, except through the water in the reservoir or tank 9 which acts as an overload condenser. This is particularly valuable after the engine has been stopped and it is still necessary to dissipate the residual heat of the cylinder block. The reservoir or tank 9 furnishes a large reserve supply of Water which serves the double purpose, of being both a reserve and a condenser.

The pipe 3 is preferably provided with a suitable check valve 11 to prevent the creation of a vacuum when the system cools after use.

This application is a division of my application for cooling system, Serial No. 131,377, filed August 25th, 1926.

What I claim is:

1. In a steam coolin system, the combination with the water acket of an internal combustion engine, of a water tank, a condenser separate from the tank, means connecting the upper part of the water jacket with the upper part of said condenser, a connection between the condenser and water tank at a point below the water jacket connection with the condenser and below the surface of the water in said tank, and a water supply connection from the water tank to the water jacket leading from the tank at a point below the connection of the condenser with thewater tank.

2. In a steam coolin frsystem, the combination with the water jac et of an internal combustion engine, of a water tank, a condenser separate from the tank, a steam outlet pipe from said jacket connecting with the upper part of said condenser, the condenser connecting with the water tank at a point below the surface of the water in the tank and above the water jacket, and a water supply connection to the water jacket connecting with the water tank at a point below the connection of the tank with the condenser.

3. In a steam cooling system, the combination with the water jacket of an internal combustion engine, of a condenser and a separate reservoir above the level of the water jacket, a steam inlet near the top of the condenser connected with the water jacket, and a connection from the bottom of the condenser to thereservoir at a point below the water level in the reservoir whereby steam forced out of the condenser must flow through the water in the reservoir.

4. In a steam cooling system, the combination with the water jacket of an engine, of a condenser and a separate water reservoir, said condenser and reservoir being connected at a point below the normal water level in the reservoir, a steam duct extending from the water jacket to the condenser at a point above the normal water level in the condenser,and a Water connection leading to the water jacket from the reservoir at a point below the connection of said reservoir with the condenser.

In witness whereof, I hereunto subscribe my name this 15th day of August 1928.

ARTHUR W. PoPE, JR. 

